Pulp-straining machine.



J. WHITE 6: F. W. GRAY.

PULP STRAINING MACHINE.

APPLICATION FILED JAN. 6, 1912.

1,044,71 6 Patented Nov. 19, 1912.

2 SHEETS-SHEET 1.

' COLUMBIA PLANOGRAPH COHNASIIINGTON, D. c.

J. WHITE & FJW. GRAY.

PULP STRAINING MACHINE.

APPLICATION FILED JAN. 6, 1912,

Patented Nov. 19, 1912.

2 SHEETSSHEET 2.

COLUMBIA PLANOGRAPH c0. WASHINGTON. n. c,

FFIGE.

JOHN WHITE AND FRANCIS WILLIAM GRAY, OF EDINBURGH, SCOTLAND.

PULP-STRAINING MACHINE.

Application filed January 8, 1912.

To all whom it may concern:

Be it known that we, JOHN WHITE and FRANCIS WILLIAM GRAY, subjects ofthe King of the United Kingdom of Great Britain and Ireland, andresiding at Edinburgh, Scotland, have invented a certain new and usefulImprovement in Pulp- Straining Machines, of which the following is aspecification.

This invention, which relates to machines for straining paper pulp, hasfor its object to provide improved means for controlling the stroke ofthe diaphragm so that it may be increased or diminished while themachine is in operation.

In the accompanying drawings Figure 1 is a part elevation partlongitudinal vertical section showing by way of example the improvementsapplied to a pulp straining machine of the type in which the strainingvessel remains stationary while the pulsating diaphragm is beingoperated. Figs. 2 and 3 show modifications.

Referring to Fig. 1 of the drawings, a pulsating diaphragm A isinterposed between the straining vessel A and the vat A and is connectedto and operated by a piston or plunger B carried downwardly into apreferably cylindrical guide C formed in a hollow chamber I) extendinghorizontally under the vat A and secured to the supporting standards Eat each end of the machine, the chamber D forming an oil bath inclosingall the working parts. To-and-fro motion is imparted to the diaphragm Apreferably by a rotating shaft F and crank G located at one end of saidchamber D and a connecting rod H which extends from said crank through arocking member I in the piston or plunger B and through a second'rockingmember J serving as a movable fulcrum. This member J is fitted in asaddle K guided in the chamber D and adapted to be traversedhorizontally within said chamber preferably by means of a screw-threadedshaft L operated by means of an external hand wheel M, so that theposition of the member J may be adjusted relatively to the crank G andthe rocking member I. By this arrangement the connecting rod II to whichis imparted a vibratory movement constituted by a combined reciprocatoryand swinging movement on the member J transmits to the plunger B a shortvertical reciprocatory Specification of Letters Patent.

Patented Nov. 15), 1912.

Serial No. 669,769.

cording to the distance between the member J and the crank G; and as theposition of the member J can be altered without stopping the machine,the stroke of the diaphragm A can be increased or diminished while themachine is in motion. The usual flexible water tight connection N isprovided between the bottom of the strainer vat A and the pulsatingdiaphragm A, and in order to support partially the weight of thediaphragm and its actuating plunger B a spring P coacting with anadjusting screw Q and plate R is inserted in the lower part of thechamber D.

To-and-fro motion may be imparted to the diaphragm A directly from belowas described, or in other types of strainers having, for example, anoscillating diaphragm S, Fig. 2, fixed on a spindle S operated from anoverhead rod T, the said rod T is carried through a flexible oil-tightdiaphragm U closing one end of a casing V constituting an oil bath andincasing suitable articulated or linked connections from a connectingrod W actuated by means of a rotating crank X and extending through anadjustable fulcrum member Y. As shown, the connecting rod W' is arrangedvertically and the fulcrum member Y is mounted on a block Z fitted toslide in a vertical part V of the casing V, while a link W serving tocouple the connecting rod IV to the said rod T extends along ahorizontal or overhanging hollow arm V of the casing V. In amodification shown in Fig. 3, the said rod T is passed through a cover asupported by a flexible sleeve 6 adapted to be secured to said arm VHaving now described our invention what we claim and desire to secure byLetters Patent of the United States is 1. In a pulp straining machine,in combination, a diaphragm, a covered chamber beneath the diaphragmaffording an oil bath, means for imparting a variable to-and-fromovement to said diaphragm, said means including a rotating crank, avibratory member wholly inclosed within the said covered chamber anddirectly connected to the said crank, a connection between said plungerand said vibratory member said connection wholly inclosed within saidcovered chamber, a reciprocatory plunger connected to said diaphragm, aslide block movable in said chamber and affording a variable fulcrum forsaid vibratory memher, and means disposed externally of the chamber forVarying the position of the slide block.

2. In a pulp straining machine, in combination, a diaphragm, a coveredchamber beneath the diaphragm affording an oil bath, means for impartinga Variable to-and-fro movement to said diaphragm, said means including arotating crank, a Vibratory member Wholly inclosed Within thesaidcovered chamber and directly connected to the said crank, aconnection between said plunger and said vibratory member saidconnection Wholly inelosed Within said covered chamber, a reciprocatoryplunge-r connected to said diaphragm, a member serving as a fulcrumthrough which said vibratory member passes, and means operable from apoint outside the chamber for varying the position of said fulcrum.

In testimony whereof We have signed our names to this specification inthe presence of two subscribing Witnesses.

JOHN WITE. FRANCIS WILLIAM GRAY.

Witnesses:

VVALLACE GRANsroN FAIRWEATHER, J OHN MCGLEARY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

